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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2001
Report date:
2001

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
GLP compliance:
yes (incl. QA statement)
Remarks:
UK GLP standards (Schedule 1, Good Laboratory Practice Regulations 1999 (SI 1999/3106))

Test material

Constituent 1
Chemical structure
Reference substance name:
(1R, 4R, 5S) 4-hydroxy-6,6-dimethyl-3-Oxabicyclo[3.1.0]hexan-2-one
EC Number:
619-753-7
Cas Number:
73611-02-6
Molecular formula:
C7H10O3
IUPAC Name:
(1R, 4R, 5S) 4-hydroxy-6,6-dimethyl-3-Oxabicyclo[3.1.0]hexan-2-one

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Duration of test (contact time):
0 - 29 d
Initial test substance concentration
Initial conc.:
16.9 mg/L
Based on:
DOC

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
65
Sampling time:
29 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable, but failing 10-day window
Conclusions:
Substance can be degraded microbiologically in the environment and in waste water treatment plants, but does not meet the criteria for being readily biodegradable.